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Method for operating a motor vehicle

A technology for motor vehicles and vehicles, applied in vehicle components, transportation and packaging, vehicle sub-unit functions, etc., to solve problems such as slow vehicle deceleration

Active Publication Date: 2014-07-30
BAYERISCHE MOTOREN WERKE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a slower deceleration of the vehicle is also produced by a softer drive torque reduction or drop

Method used

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  • Method for operating a motor vehicle
  • Method for operating a motor vehicle

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Experimental program
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Embodiment Construction

[0018] figure 1 Shown in greatly simplified form is an engine control unit SG of the motor vehicle which is not further described, which receives at least one signal fp from the accelerator pedal FP, which describes the value of the drive torque fp requested by the driver. Furthermore, controller SG receives a signal d from mode unit M which indicates to controller SG which dynamics mode d is currently present or selected. The dynamics mode d can be selected, for example, by the driver via a corresponding operating element.

[0019] In a first processing unit of controller SG it is checked with the aid of signal fp of accelerator pedal FP whether a load change, ie a change from traction operation to coasting operation, is present or required. If so, the requested drive torque fp is filtered in the second processing unit from the drive torque fp requested by the driver by means of a control signal shaper in such a way that a delayed or slowed reduction of the drive torque occu...

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Abstract

The invention relates to a method for operating a motor vehicle having at least one drive unit which is suitable for outputting a drive torque, wherein a drive torque which is requested by the driver by means of the accelerator pedal is filtered in the case of a rapid change of the accelerator pedal position by means of a torque I / O module and / or an accelerator pedal filter, or the rate of change thereof is limited with the result that a slowed-down decrease in drive torque or increase in drive torque occurs. According to the invention, in the case of a requested reduction in the drive torque at the same time as the slowed-down decrease in the drive torque a vehicle brake system is correspondingly actuated in order to bring about a predefined deceleration of the vehicle.

Description

technical field [0001] The invention relates to a method for operating a motor vehicle comprising at least one drive unit according to the preamble of claim 1 . Background technique [0002] If the driver of the motor vehicle requests load shedding by releasing the accelerator pedal and this is achieved by a spontaneous reduction of the drive torque, this leads to a rapid unloading of the elastic drive system and a tensioning of the drive system in the opposite direction due to the inertia of the vehicle, That is, the vehicle engine. Due to the rapid reduction of the drive torque and the jerk change in the drivetrain, a clearly unfavorable engine speed gradient is briefly produced, which does not have a short-term effect on a perceptible deceleration of the vehicle. [0003] However, if the vehicle is equipped with a turbocharger, this significantly unfavorable engine speed gradient results in air delivered by the turbocharger which has not yet been significantly reduced du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W30/18B60W30/20B60W10/06B60W10/18
CPCB60W10/06B60W10/18B60W30/18072B60W30/20B60W30/18181B60W50/06B60W2540/106B60Y2400/435B60W2720/106B60W2030/206
Inventor G·申克尔迈尔
Owner BAYERISCHE MOTOREN WERKE AG
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